AI Article Synopsis
- - Pollution control efforts led to the closure of the Coniston Smelter in 1972, with a previous study in 1990 indicating improved lichen diversity but still limited species near the smelter.
- - A recent study examined five sites around the smelter, discovering a total of 64 macrolichen species and an increase in both lichen richness and diversity.
- - The findings suggest that historical air pollution from the smelter no longer limits lichen growth in Greater Sudbury, indicating that other environmental factors now influence lichen populations.
Article Abstract
Pollution control initiatives in Greater Sudbury, Ontario, Canada, resulted in the decommissioning of the Coniston Smelter in 1972. The last assessment of the effects from the smelter on the surrounding lichen biota was in 1990, which showed an overall improvement in richness following these initiatives, but still few species were present close to the smelter. We examined five sites along this gradient to determine if this pattern is still present on the landscape. Sixty-four macrolichen species in 15 genera were found. Lichen richness and Shannon diversity increased at all sites, but the increase was no longer linear with distance from the smelter. There was no significant difference between lichen richness and diversity at sites at increasing distances from the smelter. We show that past air pollution from the Coniston Smelter is no longer restricting lichen growth and development in the Greater Sudbury area as it was historically. Lichen populations are, therefore, now shaped by other environmental variables.
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| http://dx.doi.org/10.1007/s11356-015-4088-4 | DOI Listing |
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